WES is the New York Stock Exchange ticker symbol for Western Midstream Partners, LP, a major master limited partnership (MLP) engaged in the gathering, compression, treating, processing, and transportation of natural gas, crude oil, and produced water. Originally formed as an asset-holding subsidiary of Occidental Petroleum (Oxy), WES operates extensive midstream energy infrastructure primarily spanning major U.S. producing basins like the Permian and Powder River Basins.